The email accounts I setup in Thunderbird with POP3 is not downloading since yesterday. I see the email in browser webmail. This is happening with two email servers that I use. I don't know how to diagnose where the problem may be coming from. This started to happen when, with the few IMAP accounts, I was getting error: "Add Security Exception: You are about to override how Thunderbird identifies this site" See Img1. I clicked on '''Confirm Security Exception''' and those accounts seem to be OK In addition when I try to send email I received a similar error. I first Canceled instead of confirming and received a '''"Send Message Error, Peer's Certificate issuer is not recognized'''. See Img2. I tried sending a second time and clicked on '''Confirm Security Exception''' which did clear up and I am able to send email. Any idea what the problem is with POP3 or where I can start to look? TIA